Cosmic Explosions
Cosmic Explosions

Author: Edo Berger

Publisher: Universal-Publishers

Published: 2004

Total Pages: 206

ISBN-13: 1581122330

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The diversity of stellar death is revealed in the energy, velocity and geometry of the explosion debris ("ejecta''). Using multi-wavelength observations of gamma-ray burst (GRB) afterglows I show that GRBs, arising from the death of massive stars, are marked by relativistic, collimated ejecta ("jets'') with a wide range of opening angles. These results suggest that various cosmic explosions are powered by a common energy source, an "engine'' (possibly an accreting stellar-mass black hole), with their diverse appearances determined solely by the variable high velocity output. On the other hand, using radio observations I show that local type Ibc core-collapse supernovae generally lack relativistic ejecta and are therefore not powered by engines. Instead, the highest velocity debris in these sources, typically with a velocity lower than 100,000 km/sec, are produced in the (effectively) spherical ejection of the stellar envelope. The relative rates of engine- and collapse-powered explosions suggest that the former account for only a small fraction of the stellar death rate. Using the first radio and submillimeter observations of GRB hosts, I show that some are extreme starburst galaxies with the bursts directly associated with the regions of most intense star formation. I suggest, by comparison to other well-studied samples, that GRBs preferentially occur in sub-luminous, low mass galaxies, undergoing the early stages of a starburst process. If confirmed with future observations, this trend will place GRBs in the forefront of star formation and galaxy evolution studies.

The Cosmic Explosion
The Cosmic Explosion

Author: Jayant Vishnu Narlikar

Publisher:

Published: 1992

Total Pages: 104

ISBN-13:

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The Story Begins In The Seventh Century During The Region Of The King Harshavardhna. Bhikku Sariputta, The Head Of The Buddhist Vihar At Sthanvishwar Is A Keen Observer Of The Star-Studded Heavens. His Pet Student Rohit Witnesses A Remarkable Sight In The Sky And Rushes To His Teacher For Guidance. Sariputta Suspects That The Event Is Of Such Great Significance That He Immediately Reports It To The King. At The KingýS Behest With RohitýS Help Sariputta Prepares Meticulous Records Of The Event Which The Buried Underground For Posterity. It Is In The Twentieth Century That The Records In The Form Of Brass Plates Are Accidentally Unearthed. Tatyasaheb Bhagvat, A Scholar On Ancient Indian Studies And The Astrophysicist Avinash Nene Together Find Might Have Momentus Implications For The Earth And Its Inhabitants. Did The Event Records By Sariputta Spell Doom? The Final Part Of The Novel Tells Us What Happened Several More Centuries Later...

Cosmic Explosions
Cosmic Explosions

Author: J.M. Marcaide

Publisher: Springer Science & Business Media

Published: 2005-11-21

Total Pages: 575

ISBN-13: 354026633X

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Supernovae are among the most energetic phenomena in the Universe and - lated to almost all aspects of modern astrophysics including starburst gal- ies, cosmic ray acceleration, neutron star and black hole formation, nuc- osynthesis and ISM chemical enrichment, energy input to the ISM, cosmic distance scale determination, dark energy related cosmological acceleration, gamma-ray bursts, extra-solar system neutrino burst detection, gravity wave generation, and many more. Additionally, the past 15 years have been p- ticularly productive with many new results and new understanding due in particular to the closest SN in 400 years in SN 1987A in the Large M- ellanic Cloud, and the unusually bright and close SN 1993J and SN 1994I in the nearby galaxies M81 and M51, respectively. In addition, the disc- ery of the ?-ray burst GRB 980425 and its related supernova SN 1998bw, and the con?rmation of GRB 030329/SN 2003dh, tied the study of SNe and GRBs inextricably together. With the many developments since the last - jor supernova meeting in La Serena, Chile in 1997, we felt that it was an appropriate time to bring together experts and students interested in the subject for a meeting where SN and GRB properties and interrelationships could be discussed. The tenth anniversary of SN 1993J provided such an - portunity and, appropriately, the meeting was held in Spain where SN 1993J was discovered on the early morning of 28 March 1993 by a Spanish amateur astronomer, Francisco Garc ́ ?a.

The Biggest Explosions in the Universe
The Biggest Explosions in the Universe

Author: Sara Howard

Publisher: Booksurge Publishing

Published: 2009-02-18

Total Pages: 0

ISBN-13: 9781439215272

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Astronomy easily explained with fun facts, wonder and gorgeous pictures. This book is short and easy to read. The writing is fresh and funny. It will delight any reader.

Supernova Explosions
Supernova Explosions

Author: David Branch

Publisher: Springer

Published: 2017-08-02

Total Pages: 719

ISBN-13: 3662550547

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Targeting advanced students of astronomy and physics, as well as astronomers and physicists contemplating research on supernovae or related fields, David Branch and J. Craig Wheeler offer a modern account of the nature, causes and consequences of supernovae, as well as of issues that remain to be resolved. Owing especially to (1) the appearance of supernova 1987A in the nearby Large Magellanic Cloud, (2) the spectacularly successful use of supernovae as distance indicators for cosmology, (3) the association of some supernovae with the enigmatic cosmic gamma-ray bursts, and (4) the discovery of a class of superluminous supernovae, the pace of supernova research has been increasing sharply. This monograph serves as a broad survey of modern supernova research and a guide to the current literature. The book’s emphasis is on the explosive phases of supernovae. Part 1 is devoted to a survey of the kinds of observations that inform us about supernovae, some basic interpretations of such data, and an overview of the evolution of stars that brings them to an explosive endpoint. Part 2 goes into more detail on core-collapse and superluminous events: which kinds of stars produce them, and how do they do it? Part 3 is concerned with the stellar progenitors and explosion mechanisms of thermonuclear (Type Ia) supernovae. Part 4 is about consequences of supernovae and some applications to astrophysics and cosmology. References are provided in sufficient number to help the reader enter the literature.

Cosmic Horizons
Cosmic Horizons

Author: Steven Soter

Publisher:

Published: 2001

Total Pages: 253

ISBN-13: 9781565846029

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Leading scientists offer a collection of essays that furnish illuminating explanations of recent discoveries in modern astrophysics--from the Big Bang to black holes--the possibility of life on other worlds, and the emerging technologies that make such research possible, accompanied by incisive profiles of such key figures as Carl Sagan and Georges Lemaetre. Original.

The Physics of Gamma-Ray Bursts
The Physics of Gamma-Ray Bursts

Author: Bing Zhang

Publisher: Cambridge University Press

Published: 2019

Total Pages: 617

ISBN-13: 1107027616

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A complete text on the physics of gamma-ray bursts, the most brilliant explosions since the Big Bang.

The Many Facets of Cosmic Explosions
The Many Facets of Cosmic Explosions

Author: Alicia Soderberg

Publisher: Universal-Publishers

Published: 2007-10

Total Pages: 265

ISBN-13: 1581123779

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Over the past few years, long-duration gamma-ray bursts (GRBs), including the subclass of X-ray flashes (XRFs), have been revealed to be a rare variety of Type Ibc supernova (SN Ibc). While all these events result from the death of massive stars, the electromagnetic luminosities of GRBs and XRFs exceed those of ordinary Type Ibc SNe by many orders of magnitude. The observed diversity of stellar death corresponds to large variations in the energy, velocity, and geometry of the explosion ejecta. Using multi-wavelength (radio, optical, X-ray) observations of the nearest GRBs, XRFs, and SNe Ibc, I show that GRBs and XRFs couple at least 1048 erg to relativistic material while SNe Ibc typically couple less than 1048 erg to their fastest (albeit non-relativistic) outflows. Specifically, I find that less than 3 percent of local SNe Ibc show any evidence for association with a GRB or XRF. Interestingly, this dichotomy is not echoed by the properties of their optical SN emission, dominated by the radioactive decay of Nickel-56; I find that GRBs, XRFs, and SNe Ibc show significant overlap in their optical peak luminosity and photospheric velocities. Recently, I identified a new class of GRBs and XRFs that are under-luminous in comparison with the statistical sample of GRBs. Owing to their faint high-energy emission, these sub-energetic bursts are only detectable nearby (z

The Cosmic Detective
The Cosmic Detective

Author: Mani Bhaumik

Publisher: Penguin Books India

Published: 2008

Total Pages: 140

ISBN-13: 9780143330691

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Are You Feeling A Little Lonely In This Vast Universe? Find Out Who Your Neighbours Are In This Spectacular And Thrilling Guide To The Deepest Mysteries Of The Cosmos. International Best-Selling Author And World-Renowned Scientist Dr Mani Bhaumik Takes Young Readers On A Whirlwind Tour Into Space With The Cosmic Detective. Addressing His Readers As Cosmic Detectives, The Author Actively Enlists His Young Sleuths In Finding Solutions To Questions That Have Puzzled Space Scientists For Ages. How And When Did The Universe Begin? What Are Stars Made Of? How Far Away Are The Most Distant Galaxies? What Is A Quasar? Explore These Fundamental Cosmic Riddles And More In This Fascinating Journey Of Discovery And Wonder. Find Out About Nebulae And Black Holes, Navigate The Galaxies And The Enormous Expanses Beyond, Dive Into The Heart Of Neutron Stars And Walk On Distant Planets As You Join The Author In Investigating The Most Bizarre Aspects Of The Cosmos. And In The Broader Context Of Our Own Existence In The Universe, Dr Bhaumik Reveals That When We Explore The Cosmos, We Also Explore Ourselves. Packed With Interesting Facts And Dazzling Colour Photographs, This Beautifully Written Primer Is Ideal For Students And Cosmic Detectives Of All Ages. Age Group Of Target Audience (Puffin): 11 + See The Wonders Of The Cosmos Here

The Cosmic E.G.G.G.
The Cosmic E.G.G.G.

Author: Richard Bruce Wallace

Publisher: Page Publishing Inc

Published: 2023-02-16

Total Pages: 253

ISBN-13: 1684562473

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Many are the mysteries concerning the universe and the life that is found within it. This is also true regarding the theories (laws) that govern it. In this book we examine the most popular ones, past and present, in search of the common constant that binds life, laws, and the universe. It exposes the views of the early hominids of Africa and those of the ancient Egyptians. It includes the Assyrians, Babylonians, Chaldean and ancient Sumerians of Asia, up to the Europeans and modem, day Americans. By combining the knowledge of all of these cultures and that of mankind worldwide, a stunning conclusion is reached. The concept of "Unification" is confirmed and it is realized in "The Order of Existence."